Filter cartridge inlet grill pattern



FIG. 1 is a perspective view of the filter cartridge inlet grill pattern;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof; and,

FIG. 4 is a side view thereof, with all other side views being the same.

The broken line showing forms no portion of the claimed design. The shading is provided only to indicate the contour; it is not indicative of texture, et cetera. 

The ornamental design for a filter cartridge inlet grill pattern, as shown and described. 